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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3112d43ccdc5272595129a0f39fa95ac638f4544bb8276e97994c215c4e5b06e' 
  AND token = 'meH0Tyu5poqdAyp3nuoSu909lmSoVLLWLdETfeqvV9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}